Improvement in chucks for lathes



UNITED STATES PATENT OFFICE.

JOSEPH SUTTER, OF NEW YORK, N. Y.

lMPROVEMENT IN CHUCKS FOR. LATHES.

Specilicntion forming part of Letters Patent No. 45,359, dated December (i, 1864; antedated November :23, 1864.

To all whom it may concern Be it known that I, JOSEPH SUTTER, ofthe city and State ot' New York, have invented, made. and applied to use a certain new and useful Improvement in Chucks for Lathes; and I do hereby declare the following to be a full, clear, and exact description of the said invention, reference bein g had to the annexed drawings, making pait of this specification, wherein- Figure 1 is a front elevation of said chuck. Fig. 2 is a back elevation, and Fig. 3 is a vertical section, of the same.

Similar marks of reference denote the same parts.

The nature of my said invention consists in a compound togglejoint motion applied to draw together three or more clamping-slides on the face of the chuck, to confine and at the same time center any article placed between said slides, said togglejoint motion being derived from a hub with arms acted on by a screw.

In the drawings, d is the socket to screw upon or otherwise attach to the revolving ltt-he-ma-ndrel.

b is the face-plate ot' the chuck.

c c c are clamps set to slide radially in the slides d d, atlixed on or formed in the facechuck b. Behind these clamps c c c are studs c-one on each clampthat project through slots or mortises in the face-plate b.

j'ffare links extending from the studs e to the arms ggg ofthe hub h, that surrounds a,

land one of the arms g is extended,and re- !'ceives a nut, i, through which the screw 7c passes.

, lis a tXed stud 011 b, taking a neck in the screw k, so that it may be turned freely, but at the same time is held in position.

4It will now be seen that by turning the hub k by the screw k the respective arms g and links j' form togglejoints, to force out or draw in the sliding clamps c and center and hold any article, or release the same by turning the screw k in the opposite direction.

"Fig, 4 shows a clamp for holding articlessuch as a crankin this chuck. m is al circular base, to be grasped and held between the ends ot' the clampingslides c. n is a bar affixed to the said base, and o is a moving bar with a block, p, sliding in a dovetail groove in m. g g are screws acting to clamp any article between m and iz., either before or after the base m has been secured between the slides c.

What I claim, and desire to secure by Letters Patent, is-

The hub l1, arms g, and linksf, in combination with the screw k and sliding clamps c, substantially as and for the purposes specitied.

In Witness whereof I have hereunto set my signature this 30th day of March, A. D. 1864.

JOSEPH SUTTER.

Witnesses:

LEMUEL W. SERRELL, Taos. GEO. HAROLD. 

